Effect of Solute Atoms on Stacking Faults in Cu-Ni and Cu-Mn Systems

The stacking-fault probability parameter, α, in Cu-Ni and Cu-Mn alloys has been examined by an x-ray method, and it was observed that (i) the contributions of Ni and Mn to the stacking-fault parameter were very small compared with those of other elements alloyed with Cu ; (ii) the stacking fault energy showed a tendency to increase with small additions of Mn or Ni. Coercive force and saturation magnetization in Ni-Cu alloys annealed at 150℃ after deformation increased with increasing annealing time. These results have been interpreted in terms of the formation of ordered clusters of solute atoms around dislocations